Malicious PDF — malware analysis report

Static analysis result for SHA-256 b360e8d40136ec7d…

MALICIOUS

PDF

83.1 KB Created: 2021-04-07 18:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 878ca1635db30fbe1a72f3434aacede9 SHA-1: be302942242e8639d9c5cb23567d10c8685c943c SHA-256: b360e8d40136ec7d1292b6fc7ad19a35ece58a42f3dc08705cb2e2e5d91987f7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to career information, likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://golowaki.ru/123?utm_term=information+auditor+career+path
    • http://maykistore.ru/les_misrables_2019_ending_explainedl5owg.pdf
    • http://temevifeg.iblogger.org/kosume.pdf
    • https://cdn.sqhk.co/wajidafix/ggibKDW/roku_account_cost.pdf
    • http://durowan.sportsontheweb.net/workforce_planning_steps.pdf
    • https://cdn.sqhk.co/tevosenijosu/cIMBXge/koripomisurulijegiwolo.pdf
    • http://perevod24-card2card.site/favorite_pokemon_of_each_type_templatetp831.pdf
    • https://cdn.sqhk.co/jemajujo/W9GU0rP/castaway_wilson_halloween_costume.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_6ac41cbd48484937a9a87fd86d6156b9.pdf?index=true
    • http://bobujosu.epizy.com/waybill_sample.pdf
    • https://aece7fbc-7072-4055-9cfa-29e0da41b620.filesusr.com/ugd/e878fd_500eead454ec4a25be2c58182b2770ca.pdf?index=true
    • http://zezepedepufuw.epizy.com/girl_interrupted_book_quotes_with_page_numbers.pdf
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_5b4432d660d0451c84dda311c0a22a16.pdf?index=true
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_83925878180e491cb5827bf10653b88a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9647402f-e16e-4b26-b8e0-803d05ee3def/what_are_the_shortcut_keys_in_photoshop.pdf
    • http://ruwitubis.rf.gd/wild_animals_colouring_pages.pdf
    • http://natizuf.onlinewebshop.net/kesigok.pdf
    • http://sogigadataga.epizy.com/9629220441.pdf
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_f864da16e276458c8665da1941c7a9b3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/db70c38b-c982-46f7-9c4b-b36eba34e0fe/which_is_the_best_institute_for_data_science_in_india.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010872.bin
d7e149b2e5c19f98548d9679fef8527522abe8c845c985e8cb3f8b5c605d294c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10872 5124 bytes
font_01_sfnt_off000119b5.bin
023987a9f826dbfbe63dffc312adbc389f489b34d9c343950b4d660fc03bed08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119B5 10892 bytes

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